<template>
  <div id="app">
    <router-view />
  </div>
</template>

<script>
export default {
  created() {
    //在页面加载时读取sessionStorage里的状态信息，如果有sessionStorage便覆盖vuex里的数据
    if (sessionStorage.getItem("store")) {
      this.$store.replaceState(Object.assign({}, this.$store.state, JSON.parse(sessionStorage.getItem("store"))))
    }
    //在页面刷新时将vuex里的信息保存到sessionStorage里
    window.addEventListener("beforeunload", () => {
      sessionStorage.setItem("store", JSON.stringify(this.$store.state))
    })
  }
}
</script>


<style lang="less">
#app,
body,
html {
  height: 100%;
}
* {
  margin: 0;
  padding: 0;
  -moz-user-select: none;
  -webkit-user-select: none;
}
.main {
  width: 100%;
  height: 100%;
}
</style>
